From a627f7963bf62ca3a4dc0ae678c45650b96b7c19 Mon Sep 17 00:00:00 2001
From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Date: Thu, 18 Feb 2021 17:39:26 +0530
Subject: [PATCH] phy: Distinguish between Rx and Tx for MIPI D-PHY with
submodes
As some D-PHY controllers support both Rx and Tx mode, we need a way for
users to explicitly request one or the other. For instance, Rx mode can
be used along with MIPI CSI-2 while Tx mode can be used with MIPI DSI.
Introduce new MIPI D-PHY PHY submodes to use with PHY_MODE_MIPI_DPHY.
The default (zero value) is kept to Tx so only the rkisp1 driver, which
uses D-PHY in Rx mode, needs to be adapted.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
include/linux/phy/phy-mipi-dphy.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/linux/phy/phy-mipi-dphy.h b/include/linux/phy/phy-mipi-dphy.h
index a877ffee845de..0f57ef46a8b55 100644
--- a/include/linux/phy/phy-mipi-dphy.h
+++ b/include/linux/phy/phy-mipi-dphy.h
@@ -6,6 +6,19 @@
#ifndef __PHY_MIPI_DPHY_H_
#define __PHY_MIPI_DPHY_H_
+/**
+ * enum phy_mipi_dphy_submode - MIPI D-PHY sub-mode
+ *
+ * A MIPI D-PHY can be used to transmit or receive data.
+ * Since some controllers can support both, the direction to enable is specified
+ * with the PHY sub-mode. Transmit is assumed by default with phy_set_mode.
+ */
+
+enum phy_mipi_dphy_submode {
+ PHY_MIPI_DPHY_SUBMODE_TX = 0,
+ PHY_MIPI_DPHY_SUBMODE_RX,
+};
+
/**
* struct phy_configure_opts_mipi_dphy - MIPI D-PHY configuration set
*
--
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